Succession in Zoo- and phytoplankton in a sewage stabilization pond |
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Authors: | H S Patil G B Dodakundi S S Rodgi |
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Institution: | 1. Water Research Laboratory, Department of Zoology, Karnatak University, Dharwar, 580003, India
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Abstract: | The investigations pertaining to zoo- and phytoplankton succession during prestabilization and stabilization of domestic waste water in a facultative pond operating at 1.22 meters depth with an average BOD loading of 336.3 kg per hectare per day and a retention period of 10 days revealed the following: - A photosynthetic sulphur bacterium Thiocystis violacea has been recorded during the second and third day along with a considerable population of ciliate protozoa and algae.
- Chlorophytes were followed by euglenoids in the ecological succession and the latter became predominant after the pond stabilized.
- Of the twelve protozoan species Halteria grandinella, Bursaria truncatella and Perispira ovum were associated with peaks of algae and vigorous photosynthesis in the stabilized pond water.
- There ia a gradual improvement in the quality of the waste water with respect to reduction in bacteria and biochemical oxygen demand and enhancement in changes in physico-chemical factors till a relatively stable community is evolved.
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